Label form for laser printer

Abstract: A pressure sensitive label form construction suitable for processing through a laser printer includes a base sheet (12) having length and width dimensions and an upper surface coated with a release composition; and a label face sheet (24) removably adhesively secured to the upper surface of the base sheet. The label face sheet is die cut into a plurality of individual labels (26) and has an adhesive applied to a lower surface thereof, and a toner-receptive coating applied to an upper surface thereof. The label sheet has a width dimension less than the width dimension of the base sheet so as to avoid adhesive contamination of the printer.

Description: This invention relates to a unique label construction which can be processed through high speed continuous laser printers. BACKGROUND AND SUMMARY OF THE INVENTION Currently, there are few products which will process through high speed continuous laser printers, such as the IBM 3800. Of the companies addressing this market segment currently known to applicant, none have a label construction which will process through a high speed laser printer in long, continuous runs. In the case of the IBM 3800 printer, the manufacturer specifies the caliper of products to be in the .056 to .076 mm (.0022 inch to 0.003 inch) range. Most acceptable label product constructions exceed this specification, however, and when fed through the printer, absorb a significant amount of heat from the toner fusing station, causing the printer to shut down. In addition, the printer manufacturer does not recommend processing pressure sensitive labels through the above noted laser printer, not only due to the thickness of the two-ply construction, but also because of possible adhesive contamination of the printer. It is a principle object of this invention to provide a pressure sensitive label construction which can be processed through a high speed laser printer without absorbing excessive heat from the unit's toner fusing system, and without adhesive contamination of the printer. The invention provides a pressure sensitive label form construction suitable for processing through a laser printer comprising: a base sheet having length and width dimensions and an upper surface coated with a release composition; and a label face sheet removably adhesively secured to said upper surface of said base sheet, said label face sheet have an adhesive applied to the lower surface thereof, characterised in that said label sheet has a width dimension at least fifty millimetres (two inches) less than the width dimension of the base sheet to provide marginal areas of base sheet on each side of the label sheet, such that adhesive contamination of the printer is avoided, and characterised in that said label sheet has an upper surface having a toner-receptive coating applied thereto. Since the adhesive on the face sheet is located away from the edges of the liner, adhesive contamination of the printer by the form product is not likely. It is a further optional feature of the invention to include a label strip along one or both of the marginal edges of the liner (but inside the tractor feed holes) to allow a sense mark to be placed in the margin for registration control. Additional objects and advantages of the invention will become apparent from the detailed description which follows. BRIEF DESCRIPTION OF THE DRAWING The single Figure illustrates a plan view of a pressure sensitive label construction in accordance with an exemplary embodiment of the invention. DETAILED DESCRIPTION OF THE DRAWINGS With reference to the Figure, a continuous forms assembly 10 includes a continuous base web 12 which is divided into individual forms by transverse lines of perforation 14. The web 12 is also provided with tractor feed holes 16 on either side of the web, adjacent marginal edges 18 and 20. The tractor feed holes may be within removable marginal strips if desired (as defined by additional longitudinal lines of perforation located inside the tractor feed holes, not shown). The web 12 comprises a release coated liner in that the upper surface of the web or base sheet is coated with a conventional release coating composition for a purpose described below. Each web or base sheet 22, as defined by a pair of transverse lines of perforations 14, has a face sheet 24 positioned thereon. The face sheet 24 is coated on its underside with an adhesive layer by which the face sheet is held to the web sheet or liner 24. The release coating on the sheet 22 permits the face sheet to be removed therefrom without damaging the liner and without destroying the effectiveness of the adhesive on the face sheet. The face sheet 24 is die cut into individual adhesive labels 26, as indicated by longitudinal cut line 28 and transverse cut lines 30, 32 and 34. The face sheet 24 is not as wide as the web sheet or liner 22, such that significant marginal areas 36, 38 of web sheet or liner 22 lie on either side of the face sheet 24. In the longitudinal direction, the face sheets 24 terminate substantially at or adjacent the transverse lines of perforations 14. The label sheet has a width dimension at least fifty millimetres (two inches) less than the width dimension of the base sheet. The upper surface of face sheet 24 is coated with a toner-receptive coating to permit printing on the labels as the form passes through the laser printer. As a result of the arrangement of face sheet 24 on web or liner sheet 22, it will be appreciated that the adhesive on the back of the face sheet 24 (ie labels 26) is located away from the marginal edges 18 and 20 as well as tractor feed holes 16 and thus, potential contamination of the printer is minimized if not eliminated. Label strips 40, 42 (having a width of, for example, ¼") may be placed along the edges of the form construction, inside the tractor feed holes 16, to allow a sensing mark (bar code or other suitable mark) to be placed in the margin for registration control. These strips are preferably of the same composition as the face sheets 24. By locating the strips 40, 42 inside the tractor feed holes 16, potential adhesive contamination of the printer is minimized. The sensor strips are located nearer to the tractor feed holes than to the edges of the face sheet. It has been found that the above described form construction may be processed through high speed laser printers without absorbing too much heat from the unit's toner fusing system and without adhesive contamination which might otherwise cause printer shutdown.

Claims: A pressure sensitive label form construction suitable for processing through a laser printer comprising: a base sheet (12) having length and width dimensions and an upper surface coated with a release composition; and a label face sheet (24) removably adhesively secured to said upper surface of said base sheet, said label face sheet have an adhesive applied to the lower surface thereof, characterised in that said label sheet (24) has a width dimension at least fifty millimetres (two inches) less than the width dimension of the base sheet (12) to provide marginal areas (36, 38) of base sheet on each side of the label sheet, such that adhesive contamination of the printer is avoided, and characterised in that said label sheet (24) has an upper surface having a toner-receptive coating applied thereto. A pressure sensitive label form according to Claim 1 characterised in that said label sheet is die cut into a plurality of individual labels (26). A pressure sensitive label form according to Claim 1 or Claim 2 characterised by one or two sensing strips (40) adhesively secured in one or both marginal areas of said base sheet. A pressure sensitive label form according to Claim 3 characterised in that the or each sensing strip has a longitudinal dimension substantially equal to the longitudinal dimension of the base sheet. A pressure sensitive label form according to Claim 3 or Claim 4 characterised in that each sensing strip has a width dimension of about 6.25 millimetres (¼ inch). A pressure sensitive label form according to Claim 3 or Claim 4 characterised in that the base sheet has lines of tractor feed holes (16) and the or each sensing strip (40) is located nearer to a line of tractor feed holes than to an edge of the face sheet (24). A pressure sensitive label form according to any of Claims 1 to 6 characterised in that the base sheet (12) is in continuous web form and in that individual base sheets are defined by longitudinally spaced, transverse lines of perforations (14).

Inventors: KHATIB KHALED M, LANGAN JOSEPH W, KHATIB, KHALED M., LANGAN, JOSEPH W.
Applicants: MOORE BUSINESS FORMS INC, MOORE BUSINESS FORMS, INC.
Application year: 1994
Main classification: G09F3
IPC codes: G09F3